CN203176459U

CN203176459U - Anti-negative pressure check valve

Info

Publication number: CN203176459U
Application number: CN 201320176615
Authority: CN
Inventors: 张文才
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-10
Filing date: 2013-04-10
Publication date: 2013-09-04
Anticipated expiration: 2023-04-10

Abstract

An anti-negative pressure check valve comprises a valve body and a check blade plate movably connected with the valve body; the check blade plate comprises a bottom liner plate and a panel arranged on the bottom liner plate; an annular slot is arranged between the bottom liner plate and the panel; one part of a sealing diaphragm gasket is embedded into the annular slot, and the other part of the sealing diaphragm gasket is exposed and placed around the panel to cover to the edge of the bottom liner plate; the inner cavity of the valve body is provided with an upright post provided with a screw, and a groove is formed in the check blade plate, and is internally provided with a magnet; the groove and the upright post correspond in position when the check blade plate closes the channel of the vale body, and the magnet attracts the screw to prevent the check blade plate from vibrating; the anti-negative pressure check valve is arranged to be a single turning cover with enhanced magnetism, and the turning cover cannot be sucked up by negative pressure in a flue or blew open from downside to upside by wind in the flue, but can be easily opened under the action of wind of a flue gas turbine when the flue gas turbine starts working, thus achieving better smoke preventing, smell preventing and venting effects.

Description

Anti-negative pressure safety check

Technical field

The utility model relates to safety check, specifically the safety check of a kind of main use in air exhaust channel or drainage pipe.

Background technique

A kind of safety check is disclosed on the market, it comprises valve body and non-return impeller, described non-return impeller and valve body flexibly connect, be coated with the seal membrane packing ring on the described non-return impeller, described seal membrane packing ring is provided with tingle, and the projection that arranges on the described non-return impeller is passed the seal membrane packing ring and fixedlyed connected with the shrinkage pool that arranges on the tingle; The inner chamber of described valve body is provided with column, column is provided with screw, and the non-return impeller is provided with a groove, is equipped with a magnet in the groove, described groove is corresponding with the position of column behind the non-return impeller closed valve passage, and described magnet holds screw and is used for preventing the vibration of non-return impeller; This safety check is provided with tingle and at least one non-return impeller because of the seal membrane packing ring, thereby causes this structure complicated, and its effect is subjected to influence to a certain degree, thereby is necessary to be improved on this basis.

Summary of the invention

The purpose of this utility model is that the structure of existing safety check is innovated and a kind of anti-negative pressure safety check is provided.

For realizing the purpose of the utility model, its disclosed technological scheme is as follows:

A kind of anti-negative pressure safety check is provided, it comprises valve body and non-return impeller, described non-return impeller and valve body flexibly connect, it is characterized in that: described non-return impeller comprises bottom lining plate and the panel that is arranged on the bottom lining plate, be provided with a circular groove between described bottom lining plate and the panel, a seal membrane packing ring part embeds in the described circular groove, another part is placed on around the panel and cover to the bottom lining plate edge; The inner chamber of described valve body is provided with column, column is provided with screw, and the non-return impeller is provided with a groove, is equipped with a magnet in the groove, described groove is corresponding with the position of column behind the non-return impeller closed valve passage, and described magnet holds screw and is used for preventing the vibration of non-return impeller.

Aforesaid anti-negative pressure safety check, it is characterized in that: described bottom lining plate and panel are connected as a single entity.

Aforesaid anti-negative pressure safety check is characterized in that: described seal membrane packing ring is provided with a projection circle; Described projection encloses sealing described circular groove gap and prevents that seal membrane is bonded at the effect on the described non-return impeller, prevents leakage gas leakage.

During the utility model use, air-flow and liquid stream are by valve body, and when flow reduced to the magnetic attraction limit value, the screw that arranges in the valve body on the non-return impeller and the valve body adsorbed and valve channel is closed; When flow during greater than the magnetic attraction limit value, the screw that arranges in the magnet on the non-return impeller and the valve body separates and valve channel is opened; Repeat these two actions and realize function of the present utility model.

After the utility model is set to singly renovate and adds strong magnetism, just renovate and can not sucked up by the negative pressure of flue or can not blown open from the bottom up by the wind in the flue, but can under the wind-force effect of cigarette machine, easily open during cigarette machine unlatching work, thereby reach the anti-flavor of good Smoke prevention and air draft effect scientific structure, for the production of safety check provides a kind of optimal technical scheme.

Description of drawings

Fig. 1 is the structural representation of non-return impeller described in the utility model when opening.

Fig. 2 is the half section structural drawing of the impeller of non-return shown in Fig. 1.

Fig. 3 is the structural representation of the packing ring of seal membrane shown in Fig. 1.

Embodiment

Below in conjunction with accompanying drawing 1 to accompanying drawing 3 embodiment of the present utility model is described, but is not limited to following examples:

A kind of anti-negative pressure safety check is provided, it comprises valve body 1 and non-return impeller 2, described non-return impeller 2 flexibly connects with valve body 1, described non-return impeller 2 comprises bottom lining plate 21 and the panel 22 that is arranged on the bottom lining plate 21, be provided with a circular groove 23 between described bottom lining plate 21 and the panel 22, seal membrane packing ring 3 part embeds in the described circular groove 23, another part is placed on around the panel 22 and cover to bottom lining plate 21 edges; The inner chamber of described valve body 1 is provided with

column

11,1 is provided with screw 111 on the column 11, non-return impeller 2 is provided with a groove 24, be equipped with a magnet 241 in the groove 24, described groove 24 is corresponding with the position of column 11 behind non-return impeller 2 closed valves 1 passage, and described magnet 241 holds screw 111 and is used for preventing 2 vibrations of non-return impeller.

Described bottom lining plate 21 is connected as a single entity with panel 22.

Described seal membrane packing ring 3 is provided with a projection circle 31.Described projection circle 31 plays sealing described circular groove 23 gaps and prevents that seal membrane is bonded on the described non-return impeller 2, prevents leakage gas leakage.

Though above shown detailed embodiment of the present utility model, those skilled in the art still can carry out the part modifications and changes under prerequisite of the present utility model; The content of mentioning in description above and the accompanying drawing is the illustration of property as an illustration only, is not to be to restriction of the present utility model, has the anti-negative pressure safety check of above-mentioned technical characteristics, all falls into this patent protection domain.

Claims

1. anti-negative pressure safety check, comprise valve body and non-return impeller, described non-return impeller and valve body flexibly connect, it is characterized in that: described non-return impeller comprises bottom lining plate and the panel that is arranged on the bottom lining plate, be provided with a circular groove between described bottom lining plate and the panel, a seal membrane packing ring part embeds in the described circular groove, another part is placed on around the panel and cover to the bottom lining plate edge; The inner chamber of described valve body is provided with column, column is provided with screw, and the non-return impeller is provided with a groove, is equipped with a magnet in the groove, described groove is corresponding with the position of column behind the non-return impeller closed valve passage, and described magnet holds screw and is used for preventing the vibration of non-return impeller.

2. anti-negative pressure safety check as claimed in claim 1, it is characterized in that: described bottom lining plate and panel are connected as a single entity.

3. anti-negative pressure safety check as claimed in claim 1 is characterized in that: described seal membrane packing ring is provided with a projection circle, and described projection encloses sealing described circular groove gap and prevents that seal membrane is bonded at the effect on the described non-return impeller.